Use stored render_frame_id_ instead of using GetRenderFrameHost(), as it may return NULL

chrome/browser/renderer_context_menu/render_view_context_menu.cc

Index: chrome/browser/renderer_context_menu/render_view_context_menu.cc
diff --git a/chrome/browser/renderer_context_menu/render_view_context_menu.cc b/chrome/browser/renderer_context_menu/render_view_context_menu.cc
index b9cd2a9eecedfce55048cba489800e61eb14f447..2d6a8525dc8db413d538853b7750a0566493380d 100644
--- a/chrome/browser/renderer_context_menu/render_view_context_menu.cc
+++ b/chrome/browser/renderer_context_menu/render_view_context_menu.cc
@@ -1697,7 +1697,8 @@ void RenderViewContextMenu::NotifyURLOpened(
     content::WebContents* new_contents) {
   RetargetingDetails details;
   details.source_web_contents = source_web_contents_;
-  details.source_render_frame_id = GetRenderFrameHost()->GetRoutingID();
+  // Don't use GetRenderFrameHost() as it may be NULL. crbug.com/399789
+  details.source_render_frame_id = render_frame_id_;
   details.target_url = url;
   details.target_web_contents = new_contents;
   details.not_yet_in_tabstrip = false;